Cryogenic Tubes - Time for a Change

Lower operating temperature and extended tube life "

How can Cryo make a tube run cooler??

I've tried cryo'd tubes in the past, not so much for the cryo, rather for claims of hand picked. I've never had an issue, but can't say for sure I heard any difference in sound quality, don't worry about cryo vs no cryo.

While I don't run EL34 amp anymore, I question quality of new EL34, I have a number of 1990's era Svetlana, last good Svetlana. I've checked into those Decware tubes, other than cryo, nothing special. I'd try to find some NOS EL34 for best sound and durability.

Just to smooth things over for the OP-

Simply trying different BRANDS, and hearing the subtle(sometimes profound, sometimes no) differences is the more reasonable thing to do-especially among us audio weirdos in an internet forum.

Just like many things in audio- thawed out tubes are nothing but another wallet draining, anecdotal exercise. IMHO.

Carry on.

@tomcy6  Prior to posting I ran a search on the discussion board. Most of the comments were quite old. I was hoping to garner more up to date info. That said, there were a few interesting questions/comments I ran across and I've forwarded these to the manufacturer (CryoTone).  

@curiousjim Your question (how can Cryo make a tube run cooler??) is a good one. I've included it with the one below. 

"Since tubes are composed of various materials, all of which expand and contract at different rates, one might think that cryo-treating tubes may cause micro cracks, fissures, or gaps where two or more materials meet, causing deleterious effects on the sound and possibly the longevity of the tubes. How does your process address these effects?"

"Since tubes are composed of various materials, all of which expand and contract at different rates, one might think that cryo-treating tubes may cause micro cracks, fissures, or gaps where two or more materials meet, causing deleterious effects on the sound and possibly the longevity of the tubes. How does your process address these effects?"

@69zoso69  I bet they’re going to say they control this by cooling VERY GRADUALLY, and SLOWLY over time (several days?), and that their totally proprietary, patent-pending (lol) process is better than any competitors because <fill in the blank, but expect some aerospace credentials to be flashed>.

That said, I agree it’s a very good question, and no amount of "we just do it really slowly" is going to 100% assuage all doubts. The reality is they’ll probably test & match again AFTER the cryo process, which will screen out tubes that might have been negatively affected by the process.

Anyways, just to reiterate I made my own determination over many years' of tube purchases, and I no longer seek to purchase cryo-treated tubes.